Mercurial > gemma

annotate pkg/common/random.go @ 2624:9dbaf69c7a66

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Improve geoserver config to better calculate bounding boxes * Disable the use of estimated extents for the postgis storage configuration for geoserver, which is set via the gemma middleware. This way we are able to get better bounding boxes for many layers where the postgis function `ST_EstimatedExtent()` would be far off.
author Bernhard Reiter <bernhard@intevation.de>
date Wed, 13 Mar 2019 16:18:39 +0100
parents 6a021108410b
children 810b28f59b8b
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1 // This is Free Software under GNU Affero General Public License v >= 3.0
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2 // without warranty, see README.md and license for details.
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3 //
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4 // SPDX-License-Identifier: AGPL-3.0-or-later
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5 // License-Filename: LICENSES/AGPL-3.0.txt
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6 //
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7 // Copyright (C) 2018 by via donau
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8 // – Österreichische Wasserstraßen-Gesellschaft mbH
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9 // Software engineering by Intevation GmbH
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10 //
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11 // Author(s):
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12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de>
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13
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ac23905e64b1 Improve WFS proxy a lot. It now generates signed re-writings.
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14 package common
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15
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16 import (
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17 "bytes"
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18 "crypto/rand"
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19 "io"
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20 "log"
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21 "math/big"
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22 )
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23
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24 // GenerateRandomKey generates a cryptographically secure random key
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25 // of a given length.
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26 func GenerateRandomKey(length int) []byte {
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27 k := make([]byte, length)
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28 if _, err := io.ReadFull(rand.Reader, k); err != nil {
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29 return nil
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30 }
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31 return k
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32 }
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33
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34 // RandomString generates a cryptographically secure password
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35 // of a given length which consists of alpha numeric characters
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36 // and at least one 'special' one.
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37 func RandomString(n int) string {
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38
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39 const (
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40 special = "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~"
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41 alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" +
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42 "abcdefghijklmnopqrstuvwxyz" +
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43 "0123456789" +
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44 special
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45 )
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46
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47 max := big.NewInt(int64(len(alphabet)))
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48 out := make([]byte, n)
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49
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50 for i := 0; i < 1000; i++ {
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51 for i := range out {
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52 v, err := rand.Int(rand.Reader, max)
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53 if err != nil {
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54 log.Panicf("error: %v\n", err)
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55 }
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56 out[i] = alphabet[v.Int64()]
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57 }
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58 // Ensure at least one special char.
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59 if bytes.ContainsAny(out, special) {
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60 return string(out)
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61 }
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62 }
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63 log.Println("warn: Your random generator may be broken.")
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64 out[0] = special[0]
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65 return string(out)
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66 }